<template>
    <div class="goodsinfo-container">
        <transition
            @before-enter="beforeEnter"
            @enter="enter"
            @after-enter="afterEnter">
          <div class="ball" v-show="ballFlag" ref="ball"></div>
        </transition>
        <!-- 商品轮播图 -->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                   <swiper :lunbotuList="lunbotu"></swiper>
                </div>
            </div>
        </div>
        <!-- 商品购买区域 -->
        <div class="mui-card">
				<div class="mui-card-header">{{goodsinfo.title}}</div>
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
						 <p class="price">
                             市场价：<del>￥{{goodsinfo.market_price}}</del>&nbsp;&nbsp;销售价： <span class="now-price">￥{{goodsinfo.sell_price}}</span>
                         </p>
                         <p>购买数量：<numbox :max="goodsinfo.stock_quantity" @getcount="getSelctedCount"></numbox></p>
                        <p>
                            <mt-button type="primary" size="small" >立即购买</mt-button>
                            <mt-button type="primary" size="small" @click="addToShopCar" >加入购物车</mt-button>
                        </p>
					</div>
				</div>
			</div>
        <!-- 商品参数区域 -->
        <div class="mui-card">
				<div class="mui-card-header">商品参数</div>
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
					 <p>商品货号：{{goodsinfo.goods_no}}</p>
					 <p>库存情况：{{goodsinfo.stock_quantity}}</p>
					 <p>上架时间：{{goodsinfo.add_time|dateFormat}}</p>
					</div>
				</div>
				<div class="mui-card-footer">
            <mt-button type="primary" size="large" @click="goDesc(id)">图文介绍</mt-button>
            <mt-button type="danger" size="large" @click="goComment(id)">商品评论</mt-button> 
        </div>
			</div>
    </div>
</template>
<script>
import swiper from "../subcomponents/Swiper.vue";
import numbox from "../subcomponents/goodsinfo_numberbox.vue";
export default {
  data() {
    return {
      id: this.$route.params.id,
      lunbotu: [], //轮播图的数据
      goodsinfo: {},
      ballFlag: false, //控制小球隐藏和显示
      selectedCount:1,
    };
  },
  components: { swiper, numbox: numbox },
  created() {
    this.getLunbotu();
    this.getGoodsInfo();
  },
  methods: {
    getLunbotu() {
      this.$http
        .jsonp("getLunbotuList")
        .then(result => {
          console.log(result);
          this.lunbotu = result.body;
        })
        .catch(err => {});
    },
    getGoodsInfo() {
      this.$http.get("goodsInfo").then(result => {
        this.goodsinfo = result.body;
      });
    },
    goDesc(id) {
      this.$router.push({ name: "goodsdesc", params: { id } });
    },
    goComment(id) {
      this.$router.push({ name: "goodscomment", params: { id } });
    },
    addToShopCar() {
      //添加到购物车
      this.ballFlag = !this.ballFlag;
    },
    beforeEnter(el) {
      el.style.transform = "translate(0,0)";
    },
    enter(el, done) {
      el.offsetWidth;
      //小球动画优化思路
      const ballPosition = this.$refs.ball.getBoundingClientRect();
      const badgePosition = document
        .getElementById("badge")
        .getBoundingClientRect();

        const xDist = badgePosition.left - ballPosition.left
        const yDist = badgePosition.top - ballPosition.top

      el.style.transform = `translate(${xDist}px,${yDist}px)`;
      el.style.transition = "all 1s ease";
      done();
    },
    afterEnter() {
      this.ballFlag = !this.ballFlag;
    },
    getSelctedCount(count){
        this.selectedCount = count;
        console.log( this.selectedCount )
    }
  }
};
</script>
<style lang="scss" scoped>
.goodsinfo-container {
  background-color: #eee;
  overflow: hidden;
  .now-price {
    color: red;
    font-size: 16px;
    font-weight: bold;
  }
  .mui-card-footer {
    display: block;
    button {
      margin: 10px 0;
    }
  }
  .ball {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background-color: red;
    position: absolute;
    z-index: 99;
    margin-left: 146px;
    margin-top: 350px;
  }
}
</style>
